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(No Model.)

' G. G. AVERY.

. PLOW. No. 290,959. Patented Dec; 25, 1883.

W 6: 7 Invewtar:

UNITED STATES PATENT Orries,

GEORGE O. AVERY, OF LOUISVILLE, KENTUCKY, ASSIGNOR TO B. F. AVERY & SONS, OF SAME PLACE. i

PLOW.

SPECIFICATION forming part of Letters Patent No. 290,959, dated Dccenzber 25,1883,

Application filed October 22, 1583.

"and exact description thereof, reference being had to the accompanying drawing, making a part of this application.-

My invention relates more particularly to an improvement in that kind of plow-standard contrivances in which the upper end of the standard is confined to and held in place by a sort of cap-plate formed with a socket-like extension, within which said upper end of the standard fits, the said cap-plate being bolted to the under side of the plow-beam. An instance of this sort of plow-standard contrivance may be seen in United States Letters Patent No. 218,417, granted to me on the 12th day of August, 187 9. In contrivances of this kind, (which are preferable to that kind made previous to said patented invention, for reasons set forth in said patent,) I have found by experience that there is a liability of breakgreat strain frequently brought suddenly on the standard to a rearward movement can be checked by the usual obliquely-arranged brace rodor device, (that extends from the lower part of the standard up to the plow-beam,) since there is always, necessarily, more or less play in the connections of said brace device and spring to the device itself. To overcome this defect-i. e., this liability of breakage in the cast-metal cap-plate or holder for the upper end of the standard-is the object of my present invention, which to this end consists in hav- ('So model.)

ing the upper end of the standard misfitted to the socket, or, in other words, fitted and secured within said socket so as to be capable of more or less of a rocking movement therein round about the retaining-pivot or other securing device, whereby the standard is supplied with a capacity to always come to a dead-lock with boththe socket-like device, which holds its upper end, and the device which braces its lower end from the plowbeam, and thus insure the distribution of any sudden strain on said standard about equally on the socket andthe bracing device, instead of permitting all the strain to be sometimes thrown wholly on the cast-metal socket with the liability of breaking it.

To enable those skilled in the art to which my invention relates to make and use plows containing it, I will now proceed to more fully explain my improvement, referring by letters to the accompanying drawing, forming part of this specification, and in whichI have shown my invention carried out in that form in which I have so far successfully practiced it. It may, 7 5 of course, be practiced in other forms and under various modifications as to the details of construction.

In the drawing is shown a longitudinal sectional elevation of so much of a plow made according to my invention as it is necessary to show in order to illustrate my improvement.

A is part of the beam. B is the standard, and O the cast-iron cap-plate, while D represents an ordinary form of device for bracing 8 5 the lower end of the standard from the beam.

I have, by preference, shown that form of the kind of contrivance to which my improvement relates, in which a simple pin is employed to secure or hold the upper end of the 0 standard B in the socket-like portion-G of the cap-plate C; but some other form of securing device might be employed.

It will be observed thatthe housing or aperture of the socket C does not conform (in 5 size and shape) to the front and rear surfaces of that portion of the standard B which is located within the portion 0 The side surfaces of that part of the standard B which is located within C fit to the interior of said portion 0 so as to hold the standard laterally in place 5 but, as seen, the front and rear interior surfaces of the portion 0" touch the front and rear surfaces of the standard only at certain points, or at least for only small dis tances. This sort of mistlt or loose fit at the front and rear permits the upper end of the standard B to rock to a slight extent on or about the axis ofthe securing-pin e, and hence when the lower end of the standard may be subjected to a sudden strain or shock, which would tend to wrench open the socket C were the standard fitted tightly and perfectly therein, said standard can turn sufficiently in the pin 0 to permit itslower end to get a complete brace from the device I), and will, at the same time, shift and increase its bearing-strain on the front and rear surfaces of the interior of socket C", distributing the aggregate twisting strain on said two surfaces. In thisiuanner the standard 13, so to speak, adjusts itself under strain to the necessary conditions relatively to the capplate socket and the beambrace D, so as to throw the shock or strain sufficiently on the latter to avoid any undue an injurious strain on the cast-iron device C C.

in place the upper end of the standard, the

socket-like portion of which is shaped interiorly so as to mislit the front and rear bearing-surfaces of that portion of the standard which is therein secured, and thus permit all the connected parts to come to a dead-lock without undue strain on the cap-plate, as set forth.

In witntss whereof I have hereunto set my hand this 13th. day of October, 1883.

GEORGE t. AVERY.

In presence of R. W. HERB, A. T. oni w \ni-:, N. 11. \ViLsoN. 

